US1512426A - Automatic start and stop mechanism for phonographs - Google Patents

Description

Qd. 2l 924, 1,512,426

, s. KOHN AUTOMATIC START AND STOP MECHANISM FOR PHONOGRAPHS Filed June 16 .1922 2 Sheets-Sheet .L

)j A TTOHIVEY s. KOHN AUroMATIc START AND sToP VMECHANISM Fo Er'IoNoGRAPHs Filed June 16. '1.922 l 2 Sheets-Sheet 2 Patented @CL Zi, i924,

SAMUEL KOI-IN, OF NEW YORK, N. Y.

AUTOMATIC START AND STO? MECHANISM FOR PHONOGRAPHS.

Application filed June 16, 1922.

T0 @ZZ whom t may concern:

Be it known that I, SAMUEL KoHN, a citizen of the United States, residing at New York, county and State of New York, have invented new and useful Improvements in Automatic Start and Stop Mechanism for Phonographs, ofwhich the following is a specification.

rIhis invention relates to automatic startand-stop mechanism and is designed particularly for use in connection with phonographs of the type in which a rotary disk record is employed, although it may be found useful in other and different connections.

Qne of the objects of this invention is the provision of a stop mechanism normally operative but rendered inoperative by the movement of the tone arm across the record and until the tone arm ceases to move at which time it becomes operative to stop the phonograph.

Another object is the provision of novel means for automatically stopping the phonograph when the selection on the record has been played without the us-e of the usual brake or retaining levers for the brake.

Another objectis to provide a start-andstop mechanism which does not depend upon frictional contact with the tone arm or connected parts.

Still another object is to provide a device which is simple in construction, inexpensive Vto manufacture, composed of few parts and one which will automatically stop the phonograph when the end of the selection is reached regardless of variations in the pitch of the sound groove of the record used and no matter how long or how short the selection may be, and which will start the phonograph upon subsequent movement of the tone arm to its extreme outward position.

Still another object is the provision of a start-and-stop mechanism consisting of a rotating arm directly connected to the moto-r operating mechanism so that if the rotation of the arm be arrested, the motor must also stop.

Heretofore it has been necessary in automatic stop devices to usev a brake normally act-ive and a retaining lever to hold the brake inactive while the selection on the record is being played and then the retaining lever is tripped releasing the brake to stop the machine.

Serial No. 568,845.V

I have overcome the many diiiiculties presented by the old arrangement and'have reduced the numb-er of working parts by eliminating the usual brake and avoiding' the use of any retaining lever, etc.

Also it has heretofore been necessary to interpose some frict-ional connection between the tone arm or swinging element and its related parts propelled or actuated by it and this was necessary because of the fixed or stationary position of the pivots for the various parts in relation to the swinging element or tone arm.

This also I have overcome by providing a floating or migratory pivot permitting the location of the pivot to be lchanged to main- Y tain substantially the same relation to the swinging element.

lVith the aboveand other objects in view, my invention consists in certain novel features of construction'and in certain parts and combinations hereinafter to be described and more particularly pointed out in the claims. l

In theaccompanying drawings forming a part of this specification Fioure l is a planview of a phonograph equipped with an automatic start and stop mechanism embodying the invention, certain parts being broken away for clearnessand showingthe relation of parts while the turntable is at rest.

Figure 2 is 4a similar view showing the relation of parts while the turntable is in motion. 4 K

vFigure 8 is an elevation of the same, partly in section. 4 Y

Figure 4 is a Sectional view v'on line et+/,t on Figure 1.

The phonograph elements are illustrated to such an extent only as is necessary for the proper understanding of the invention and are represented by the motor board or casing l, above which ismounted the turntable 2 operated in the usual manner on theV turntable shaft 3 by the usual motor (not shown). a is the usual tone arm, carrying the sound box or reproducer 5 and the stylus A or needle 6 and which, when the machine is in operation, 1s swung inwardly by the needle which rests in the spiral sound `groove i7 of the usual record disc e.Y

An automatic start-and-stop mechanism embodying the invention comprises a gear 8 meshing with and operated by a pinion 9 tixedly attached to the rotating element or turntable shaft 3, the gear 8 being keyed or otherwise fastened to the lower end of a shaft 10 journaled for free rotary movement within a bearing 11, fixed as by riveting or spinning to a supporting plate 12, mounted upon the motor board 1 and secured to it with screws or other fastening means. The upper end of shaft 10 is shouldered and screw threaded to engage the internal thread of an arm 13 for retaining the shaft in the proper relation with its bearing 11 and for other purposes which will presently appear( Obviously when the rotating element 3 revolves it rotates the gear 8 through the agency of the pinion 9, and the gear 8 necessarily rotates with it the shaft 10 and its arm 13.

Pivotally mounted on a shoulder of the bearing or bushing 11 is, what I term, a floating support 16, the free end of which carries the-lever 17 loosely slidably pivoted to it by means of a shouldered stud 18 fastened to the support 16 through a longitudinal slot 19 in the lever.

The end of the lever nearest the pivot is preferably provided kwith a spring clip or saddle 2O adapted for slidable frictional engagement with the lever 17, the clip being provided with a downturned projection or linger 21 for engagement in recess 22 in the edge of the lever for limiting the movement of the clip and it is further provided with registering perforations 23 within which and a slot 2e' of the lever is loosely conned the bent end 25 of the arm 26 fastened to the tone arm as by screws or other fastening means 27. However, I have found that I might. omit the spring clip 2O by shortening the slot 241 in the lever 17.

The other end of the lever 17 is provided. with an extension 28, the purpose for which will presently appear. An abutment is preferably bent up from the supporting plate 12 and acts to limit the movement of the lever 17 as will'more clearly appear as the description progresses. @ne side of the lever 17 intermediate its endsis provided with a downturned lug 31 for engaging the edge of the support 16 to maintain the relative position of the lever and support when the lever is moved in one direction.

In operation the device works as follows:

Referring now to Figure 1 of the drawing the full lines show the tone arm with its reproducer and stylus, removed from the disc record and also shows the relative position of the various parts when the machine :is at rest. To start the phonograph it is only necessary to move the tone arm t outwardly to its extreme position as shown by dotted lines in Figure 1. This movement causes the arm 26 carried by the tone arm, to describe an arc and due to the engagement of the bent end 25 of the arm 26 with the lever 17 the movement of the t0n@ arm causes the end of the arm to Contact with one e-nd of the slots 23 and 24 respectively of the lever 17 and the clip 2U, thus causing the lever 17 to be drawn outwardly, to withdraw its end from between the rotating arm 18 and the abutment 30 and permitting the rotating arm under the influence of the motor to rotate with the rotating element.

The stylus is then placed upon the record in the usual manner and continues to advance toward the center of the record until it has reached a predetermined point within a short distance of the last sound convolution on the record. During this normal inward movement of the tone arm, the end of the arm 26 contacts with the further side of the slot 2l in the lever and will turn the lever on its pivot until the lug 31 contacts with the edge of the support 16. rlhen further movement of the tone arm will cause the support to be moved about its pivot 15, the relative position of the support and lever being maintained by the constant pressure of the bent end of the arm 26 on the side of the slot. lWhen the end 25 in describing its arc finally reaches the bottom of tte slots 23, the pressure is then transferred to the clip thus tending to move it downward longitudinally of the lever, but due to the frictional engagement of the clip with the lever, the lever itself is moved downward longitudinally until it has reached the limitof its movement, the end of the slot 19 contacting with the pivot 18. rllhe parts are then in the relative positions shown in solid lines on Figure 2. Further pressure on the clip, will cause it to move relatively of the lever without interfering with it in any way.

.lt will be noticed that in this position the extension 28 is presented into the path ofthe rotating arm 13 which in its rotation will contact with the extension and cam it outof its path so that it may continue to rotate, butv this camming nievement has caused the opposite edge 29 of the' lever to be presented into 'the path of the rotating arm and unless the lever were moved again the rotating arm would, npon the next revolution, contact with it and move it against the abutment 30 and stop the machine. lt is obvious of course that some method must be provided for pir/2 oting the lever from the path of the-ro tating arm during thel normal movement of the tone arm. This is accomplished in the following manner.

During the normal movement of the tone arm-the end of the arm 26 moves the lever both downward longitudinally and forward pivotally so that after the rotating arm has cammed the extension and continues in its rotation, before it makes a complete revolution, the tone arm, in its forward movement will have turned the lever on its pivot thus removing it from the arms p-ath and presenting instead the extension 28. It is obvious of course that the lever will no-t be turned on its pivot by the camming action of the rotating arm against the extension but that instead the support 16 will be moved aboutits own pivot thus advancing the pivot of .the lever slightly forward concentrically with the rotation of the arm. This will be more clearly understood when it is explained that we have in effect a lever of the second class in which the rotating arm 13 acts as the power, the bent end of the arm 26 acts as the fulcrum, and the support 16 acts as the weight.

IVe have in effect a `Heating support which is being intermittently advanced about its pivot by the camming action of the rotating arm. 1When the tone arm ceases t-o move by reason of its having reached the last sound convolution in the record, the lever will no longer be turned on its pivot and hence when the rotating arm makes another revolution, it will contact with the edge 29 4of the lever, and move it against the abutment; 30 thus checking the arms further rotation, all of which is clearly shown by dotted lines on Figure 2 of the drawing. When the movementl of the rotating arm is checked it necessarily checks with it the movement of the rotating element and thus stops the machine. Suppose now it is desire-d to change the record orto repeat the reproduction upon .the record. It is then but necessary .to .lift the tone arm in the usual manner and swing saine outwardly to the full line position shown in Figure 1. This movement will cause the end of .the arm 26 to contact with the near side of the slot. 24 causing the support 16 to turn on its pivot although permitting the end of the lever 17 to remain between the rotating arm 13 and the abut ment 30, until after the new record has fbeen placed upon the turn table and the tone arm moved to its fully extended or extreme position shown by the ldotted lines on Fig* ure 1. y

'While one embodiment of the inventive idea has been herein described and illustrated in detail, it is apparent that the invention is `not restricted to the particular structural embodiment which ris illustrated and described, but that it is susceptible of various embodiments conforming to the detinition of the invention given in the claims which follow. f

"What I claim is 1. An automatic stop mechanism for phonographs comprising a rotating arm propelled by the phonograph' motor, a lever, an abutment, and means for automatically interposing one end of the lever between the rotating `arm and the abutment.

2. In combination with a rotating element and a swinging element, a stop mechanism for the rotating element comprising, a support, a lever, an abutment, and a rotating arm adapted whenthe swinging ele ment ceases to move,-to interpose one endy of the-lever between it and the abutment, and means for removing the "lever 'from between said rotating arm and said'abutment.

3. In combination withY a phonograph i propelled by the phonograph motor, apivoted support, a lever pivotally carried by said support and adapted when the .tone arm ceases to move, to intercept the rotating arm to stop the machine.

5. In combination with a rotating element and a swinging element, a rotating arm propelled by the-rotating element, a support, a. lever pivotally ycarried by said support, an abutment and automatic' means for interposing one end of said lever tween the abutment and the arm to arrest the arms rotation. c

6. An automatic start and stop mechanism for phonographs .comprisingfan arm rotatedby the phonograph motor, a pivoted support, a lever pivotally c arried by said support and `adapted to intercept the rotating arm to stop the motor when the tone arm ceases to move, and automatic means for 'restoring the parts to theirinitial position.

7. In combination with a rotating element and a swinging element, a rotating arm propelled by the rotating element, a support adapted for pivotal movement concentric with said arm,"a lever pivotally carried by said support, an abutment and automatic means :tor interposing one end of the lever' between the abutmentand the rotating armto arrest the rotation o1 said arm.

8. An automatic stop mechanism for phonographs comprising a rotating varm propelled by the phonograph motor, a lever, an abutment, and automaticmeans adapted when the selection on the record is complete to interpose one end of the vvlever between therotating -arm and thec abutment to stop the phonograph.

9. 'An automatic' stop mechanism tor phonographs comprising a rotating arm propelled to the phonograph motor, a support, a lever pivotally carried by said sup# port, an abutment, and automatic means operable when the tone arm ceases -to move n MC- to interpose one end of the lever between said rotating arm and said abutment to stop the phonograph.

10. In combination with a rotating element and a swinging element, an arm positively rotated by the rotating element, a pivoted support, a lever loosely pivotally carried by said support, one end of' said lever being actuated by the rotating arm to move the support, and when the swinging element ceases to move, to check the rotation of the arm.

11. An automatic stop mechanism for phonographs, comprising a rotating arm propelled by the phonograph motor, a pivoted support, a lever loosely pivotally carried by said support, one end of said lever being actuated by the normal movement of the swinging element, the other end of said lever adapted when the swinging element ceases to move, to check the rotation of the arm.

12. An automatic stop mechanism for phonographs comprising a irotating arm propelled by the phonograph motor, a pivoted support, a lever loosely pivotally carried by said support, one end of said lever being actuated by the normal movement of the swinging element, the other end of said lever being actuated by the rotating` arm to move the support, and when the swinging element ceases to move, to check the rotation of the arm.

13. In combination with a rotating element and a swinging element, an arm rotated by the rotating element, a pivoted support, a lever pivotally carried by said support, one end of the lever being actuated by the rotating Velement to move it into the path of the rotating arm, the other end of the lever being actuated by the normal movement of the swinging element to move the lever out of the path of the rotating arm.

11i- The combination with a rotating element and a swinging element, of a revoluble member propelled by the rotating element, a lever, a floating support for the lever, an abutment, means `for turning the lever on its pivot during the normal movement of the swinging element, and means adapted when the swinging element ceases to move to interpose the lever between the revoluble member and the abutment.

l5. An automatic start-and-stop mechanism for phonographs comprising a pivoted support and a rotating arm, the rotating arm and the pivot of the support havw ing a common centre, an abutment, a lever loosely pivoted to the support, means for moving` the lever about its pivot in one direction during the normal movement of the tone arm acrossthe record, means for moving the support about its pivot in one certain direction said means also adapted, when the tone arm ceases to move, to interpose one end of the lever between the abutment and the rotating arm to stop the phonograph, and means operable by the swinging element when it is subsequently moved to its eX- treme outward position, to start the phonograph.

16. In combination with a rotating element and a swinging element, a rotating arm propelled by the rotating element, a pivoted support, a lever loosely pivoted to said support, and means associated with said rotating arm for intermittently advancing said support about its pivot.

17. In combination with a rotating element and a swinging element a rotating arm propelled by the rotating element, a pivoted support, a lever loosely pivoted to said support, and means for advancing said support about its pivot.

18. In combination with a rotating element and a swinging element, a rotating arm propelled by the rotating element, a support pivoted concentrically of said arm, a lever loosely pivoted to said support, and means for intermittently advancing said support about the common centre.

19. In combination with a rotating element and a swinging element, a rotating arm propelled by the rotating element, a pivoted support, a lever loosely pivoted to said support, means for advancing said support about its pivot, and automatic means operable when the swinging element ceases to move, to render said first means inactive.

20. The combination with a rotating element and a swinging element; of a rotating arm propelled by the rotating element, a loosely pivoted. lever having` a migratory pivot, and means forv moving said pivot about the center of the rotating arm.

21. The combination with a rotating element and a swinging element, of a rotating arm propelled by the rotating element, a lever having a migratory pivot, means -ifo: moving said pivot about the centre of the rotating arm, and automatic means operable when the swinging element ceases to move to render said f irst named means inactive.

22. In combination with a rotating element and a swinging element, a rotating arm propelled by the rotating element, a pivoted support having the centre of its pivot coincident with the centre of the rotating arm, a lever loosely pivoted to the free end of said support, means on the swinging element to move the lever about its pivot one direction during the normal movement of said swinging element, and meansl actuated by the rotating element during said normal movement, for intermittently advancing the support.

23. In combination with a rotating element and a swinging element, a pivoted support, a lever slidably pivoted to said support and adapted to be actuated at one end by the normal movement of the swinging element, the other end of said lever being adapted when the swinging element ceases to move to stop the rotating element.

24. The combination with a. rotating element and a swinging element; of a pivoted lever, a rotating arm and an abutment, the rotating arm being adapted to move the lever into its path during the normal movement of the swinging element and to be stopped when the swinging element ceases to move, by the coaction of the lever with the abutment.

25. In combination with a rotating element and a swinging element, a rotating arm propelled by the .rotating element, an abutment, a pivoted support, a lever pivoted to said support one end of thelever being actuated by the normal movement of the swinging element the other end of the lever adapted when the swinging element ceases to move to coact with the abutment to check ythe rotation of the rotating arm.

26. An automatic start-and-stop Vmechanism for phonographs comprising a 'rotating arm propelled bythe phonograph motor, a pivoted support, a lever pivotally carried by said support and adapted when the tone arm ceases to move to intercept the rotating arm -to stop the motor, and means'or advancing the lever longitudinally and retaining it in such position during kpart or all of thenormal movement of the tone arm and until the tone arm is subsequently manually moved to start the phonograph.v

27. In combination with a rotating element and a swinging element, a rotating arm propelled pivoted support, a lever loosely pivoted to said support, and means for intermittently advancing said support about its pivot a distance equal to the distance travelled by the Vswinging element during one revolution of the rotating arm.

28. In combination with a rotating element and a swinginga element, a yrotating arm propelled by the rotating element, a pivoted support, a lever loosely pivoted to said support, an extension on said lever, means for intermittently advancing said support about its pivot a dista-nee equal to the .distance travelled by the swinging element during one revolution ofthe rotating arm, and means p 'bring its extension into the path of the rotating arm during thernormal movement of the swinging element.

V29. In combination with a Arotating element and a swinging element, a rotating arm propelled by the rotating element, a loosely pivoted lever having a migratory pivot, and lmeans for moving 'said pivot about the centre of the rotating armV a distance equal to .the distance travelled by the by the rotating element, a

for pivoting the lever to swinging element during each revolution of the rotating arm.

30. In combination with a rotating element and a swinging element, a rotating arm propelled by the rotating element, a-

lever having an extension and a migratory pivot, means for moving said pivot about the centre. of the rotating arm a distance equal to the. distance travelled by the swinging element during each revolution of the rotating arm, and means for pivoting the lever to bring its extension into the path of the rotating arm during the normal `movement of the tone arm.

3l.. In a combination with a rotating element and a swinging element, a rotating arm propelled by the rotating element, a lever having a migratory pivot, means foi1 moving said pivot about the centre of the rotating arm a distance equal to the distance travelled by the swinging yelement durin each revolution of the rotating arm, and automatic means operable when the swinging element ceases to move t0 render sai'd first `means inactive.

32. In combination'with a rotating element .and a swinging element, a rotating arm propelled by the rotating element, a lever having a migratory pivot, an eXtension on said lever, means for moving said pivot about the centre of the rotating y'arm a distance equal to the distance travelled by the swinging element during each revolution of the rotating arm, means for pivoting the lever to bring its extension into the path of the rotating arm during vthe normal movement of the swinging element, and automatic means operable Vwhen the swinging element ceases to move 'to render said first means inactive.

33. In a combination with a Yrotating element and a swinging element, a rotatable arm propelled b-y the rotatingV element, a pivoted support having the centre of Vits pivot coincident with the centre of the rotating arm, a lever loosely pivoted to the free end of said support, means on the swinging element for moving the lever about its pivot in one 4direction during the normal movement of said swinging element and means actuated by the rotating element Jfor intermittently advancing the pivot of the lever a distance, equal to the distance travelled by the swinging element during one revolution of the rotating arm.

34. In combination with a rotating element and a swinging element, a rotating arm propelled by the rota-ting element, a lever, an abutment, means for automatically interposing one end of the lever between the rotating arm and the aibutmentto stop said arm, and means for retaining the lever in said vposition until freed by manual movement of the swinging element.

manual movement of the swinging element.

36. In combination with a rotating element and a swinging element, a rotating arm propelled by the rotating element, a support, a lever pivotally carried by saidA support, an abutment, automatic means for interposing one end of said lever between the abutment and arm to arrest the arms rotation, and means for retaining the lever in said position until freed by manual movement of the swinging element.

37. The combination with a phonograph, of a brakeless stop and starting mechanism, operative when the tone arm ceases to move to stop the phonograph and when the tone arm is subsequently manually moved to eX- treme outward position, to start the phonograph.

38. The combination with a rotating element and a swinging element of a brakeless stop mechanism operable when the swinging element ceases to move to stop the rotating element.

89. The combination with a phonograph I having a rotating Velement and a swinging element, of means operable when the swinging-element ceases to move, to intercept the rotating element and stop it at the point of interception. Y

40. The combination with a rotating element and a swinging' element, of a pivoted support, alever loosely pivoted to said sup-- port, an abutment and means rotated by the rotating element and coacting with the lever and the abutment when the swinging element ceases to move, to stop the machine.

41. The combination with a rotating element and a swinging element, of a'loosely pivoted lever having a migratory pivot, an abutment, and means rotated by the rotating element and coacting with the lever and the abutment when the swinging element ceases to move, to stop the rotating element.

42. The combination with a rotating element and a swinging element, of -a Vloosely pivoted lever having a migratory pivot, means for moving said pivot periodically an abutment, and means rotated by the rotating element and coacting with the lever and the abutment when the swinging element ceases to move, to stop the rotating element.V

43. The combination with a rotating element and a swinging element, of a loosely pivoted lever having a migratory pfivot,

means for moving said pivot periodically, an abutment and means rotated by the rotating element and coacting with the lever and the abutment when the swinging element ceases to move, to stop the rotating element, and means for returning the parts to their initial relative position.

44. An automatic start-and-stop mechanism for phonographs comprising a rotating arm propelled by .ghe phonograph motor, a pivoted support, and a lever pivotally carried by said support and adapted when the tone arm ceases to move to intercept the rotating arm to stop the motor and means to free said arm to start the motor.v

45. In combination with a rotating element and a swinging element, a rotating arm propelled bythe rotating element, a support, a lever pivotally carried by said'support, an abutment, automatic means for interposing one end of said lever between the abutment and the arm to arrest the arms-rotation and means to freesaid arm to permit it to continue to rotate. i Y v 46. An automatic stop mechanism for phonographs, comprising a rotating arm propelled by the phonograph motor, a lever, an abutment, automatic means adapted when the selection on the record is complete to interpose one end of the lever between the rotating arm and the abutment to stop the phonograph, and means vto remove the lever from between said abutment and said arm to start the phonograph. A

47. In combination with a` rotating element and a swinging element, a rotating arm propelled by the rotating element, a support adapted for pivot-al movement concentric with said arm, a lever pivotally carried by said support, an abutment, automatic means for interposing oneend of the lever between the abutment and the rotating arm to arrest the rotation of said arm, and means operable by the swinging lelement when'it is moved outwardly toits extreme position to remove the lever to release said arm.

v 48. An automatic stop mechanism for phonographs, comprising a rotating arm propelled by the phonograph motor, a support, a lever pivotally carried by saidsupport, an abutment, automatic means operable when thetone arm of the phonograph ceasesv to move, to interp'ose one end of the lever between said rotating arm and said abutment to stop the phonograph, and means to remove the lever from between said abutment and said arm to start the phonograph. Y 49. In combination with a rotating element and a swinging element, an arm positively rotated by the rotating element, a pivoted support, a lever loosely pivotally carried by said support, one end of said lever being actuated by the normal movement of the swinging element, the other end of said lever adapted when the swinging element ceases to move to check the rotation of the arm to stop the rotating element7 and means operable by the swinging element when it is subsequently moved outwardly to its eXtreme position to release said arm to permit the rotating element to continue its rotation.

50. rlhe combination with a rotating element and a swinging element, of a startand-stop mechanism Comprising a rotating 10 arm, a lever, a migratory pivot for said level1 and an abutment, said mechanism serving to automatically stop the rotating element when the swinging element ceases to move, and to start the rotating element when the swinging element is moved outwardly to its extreme position.

In testimony whereof I herewith afiX my signature.

SAMUEL KOI-IN.

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